Heating means



Jan. 31, 1939. E. N. CALHOUN 2,145,684

HEATING MEANS Filed Feb. 14, 1936 Eauzs'r N. CALHouN lN ILNTOK 5 4W, WWW 4M...

ATTOR -T Patented Jan. 31, 1939 UNITED STATES PATENT OFFICE r. by Edwin L. Wiegand Application February 14, 1333, Serial No. 33,935

'lClalms.

In the drawing accompanying this specification,

and forming a part oi this application, I have shown, for purposes of illustration, one form which my invention may assume, and in this drawing;

Figure 1 is a perspective view of the embodiment of my invention,

Figure 2 is a vertical sectional view, the line of section being suggested by the line 2-2 of Figure 1, and

Figure 3 is a bottom plan view of the embodiment, a part of the reflector means being broken away to more clearly disclose structure otherwise hidden, and a part of the supporting flange being broken ofl to better lit the view to the sheet.

The embodiment of my invention herein disclosed comprises heating means In and Ii, which may be in the form of annular, concentric electrical heating units, as best shown in Figures 1 and 2. The heating means l and II are respectively provided with electrical resistance heating members [2 and I 3 disposed within a suitable metallic shell or sheath and suitably insulated from the confining walls of the sheath.-

Each'of the heating means'il and ii is provided with terminals l4 suitably electrically connected to the respective resitance members i2 and i3 to provide for the connection of conductors i5 leading to .a source of energy. 'In this case the conductors i5 lead to terminals i3 disposed within an insulating block H, which may be of porce lain. The insulating block." isprovl'ded with apertures it through which energy conductors (not shown) may be disposed for connection to the terminals I6. The block 11 is held in operative position by reason of its connection to the conductors I5, the'latter preferably being in the form of elongated strips, as best shown in Figure 3.

23, there is provided a recessed boss 24, having an aperture through which one end of a securing device, such as a staple means, may be passed and secured, the other end of the securing device be: ing secured to a respective heating means. In this manner, the heating means HI and II are effectively secured to the support i9, and as suggestedin Figures 1 and 2, the heating means are disposed at the top side of the support IS. The lug is provided with an internally screwthreaded boss 25, projecting from the under side thereof.

At radially spaced points, the, web 23 is provided with radial extensions 23, here shown to be three in number and spaced equidistantly with respect to one another. Each of the extensions 23 is provided with a downwardly projecting abutment 21, and a. lug portion 23 tapering downwardly from thetop surface of the support iii to a point midway of the width of the extension 26, and forming a shoulder 22. It will be understood that the terms up, down, top, and under are used to designate the disposition of the parts when normally assembled with a stove or other supporting surface.

The heating means In and ii, when properly secured to the mounting means i9, may be assembled with a stove surface byresting theunder side of the webs 22 and 23, and the extensions 23, directly on the surface, and permitting any depending parts to project through an aperture in the surface. However, in some instances, the aperture 3|! in the stove surface 3|, as designated by broken lines in Figure 2,'is greater in size than thesize of the web 23, and in that case an adapter means 32 may advantageously be used. The adapter means 32 here shown comprises anv annular sheet metal plate 33 having downturned inner and outer flanges and 33. The inner flange 34 is provided 'with recesses 33, and the adapter means 32 may be assembled by disposing the terminating margin of the inner flange 34 on the tapered surfaces of the lug portions 28, with the recesses 36 formed in the inner flange 34 in alignment with the lug portions 28, and pressing downwardly on the adapter means 32 to, cause the margins of the recesses 38 to snap into engagement with the shoulders 29 of the lug portions 23. The combined structure may then be assembled with the stoveby resting the terminating margin of the ila'nge 33 on the stove surface 3i and permitting the depending parts to extend through the aperture 33. The inner flange 34 may be provided with struckout parts 31 to engage the surface of the stove aperture so as to resiliently hold the-assembled heating means in position with respect to the stove.

Disposed on the under side of the support l9, or on the side opposite the heating means Ill and H, is a reflector means 39, for reflecting upwardly at least a part of the heat radiating from the heating means l and II. The reflector means 38 is here shown as being generally annular and dish-shaped, and is provided with a central aperture 39, surrounded by .an upwardly slanting annular surface 40, outside of which is a downwardly slanting annular surface 49a, merging with an abruptly curved annular surface 4| terminating in a flat flange 42. The curved surface 4| and flange 42 are interrupted, as shown at 43, to provide for the passage of the strip conductors I5. It will be apparent .that the shape of the reflector means herein shown is merely illustrative of one form thereof, and that the reflector may be shaped otherwise than that herein shown. The margin of the flange 42 is of a diameter to closely lie within the compass of the abutments 21 formed on the extensions 26 of the web 23, so that the reflector is properly registered with the heat- .ing means l0 and H, and the support l9. Ap-

plication of thereflector means 38 to the support l9 in predetermined position may be assured by forming the support l9 with a pair of spaced arms 44 disposed on opposite sides of the insulating block H, the arms 44 cooperating with the interruptedportions of the curved surface 4| and flange 42 to provide assembly of the reflector means 38 in one position only.

Fastening means 45 are provided to hold the reflector means 38 to the support l9, and as here shown, the fastening means 45 comprise a stud 46 provided with screw-threads at its opposite extremities. One extremity of the stud 48 is screw-thre'adedly disposed within the aperture in-the boss 25, and the opposite extremity projects from the boss 25 and extends through the central aperture 39 in the reflector means 38. A

wing nut 41 is threaded .on the free extremity of the stud 46, the wing nut 41 being run up to engage the surface of the reflector means 39 adjacent the margin of the aperture 39. As best shown in Figure 3, the wing nut 41 is preferably elongated to span the aperture 39, and is relatively narrow so as not to completely'obstruct passage through the opening formed by the aperture 39. It will be understood, of course, that the fastening means may be variously changed, as for instance, the stud 49 may be made integral with the wing nut 41, and fastening of the reflector means 34 to the support l9 may be' effected by threading the extremity of the stud into the screw-threaded aperture in the boss 25. From the foregoing it will be apparent to those skilled in the art that the illustrated embodiment of my invention provides a new and improved heating means economical in construction and assembly, and accordingly, accomplishes at least the principal object of my invention. It further will be obvious to those skilled in the art that the illustrated embodiment of my invention may be variously changed and modified without departing from the spirit of my invention, or sacrificing all of the advantages thereof, and that accordingly, the disclosure herein is illustrative only, and my invention is not limited thereto.

I claim: 1. In combination: a support; heating means mounted on said Supp rt; reflecting means cooperable with said heating means, said reflecting means being provided with an aperture; and

amacss fastening means having a part engaging said reflecting means adjacent the margin of said aperture, said fastening means being constructed and arranged to hold said reflecting means to said support, and to close of! only a portion of said aperture.

2. In combination: a support having centrally disposed lug means provided with a screwthreaded aperture; generally annular heating means mounted on one side of said support; generally annular reflecting means, disposed on the other side of said support, and being cooperable with said heating means, said reflecting means being provided with a central aperture; and fastening means, including a stud provided with screw-threads on its extremities, and an elongated wing nut, one extremity of said stud being screwthreadedly engaged within said lug means aperture, and the other extremity projecting through said reflector aperture and being engaged by said wing nut, said wing nut spanning said reflector means aperture to hold said reflector means to said support, and being relatively narrow to close ofl only a portion of said reflector means aperture.

3. A heating device, comprising: a support;

heating means, secured to one surface of said support; heat directing means, cooperable with said heating means, and comprising a generally dish-shaped body having a central opening, the peripheral edges of said body bearing against the opposite surface of said support; and fastening means extending from said support and through said central openingand engaging portions of said directing means adjacent said opening, holding said directing means to said support.

4. A heating device, comprising: asupport;

bearing against the surface of said directing means adjacent said aperture.

5. A heating device, comprising: a supporting means, adapted to be supported from a stove top; one or moreheating units supported by said supporting means on the upper side of said supporting means; a reflector beneath said supporting means, provided with a central aperture for the passage of air; said supporting means-comprising. meansengaging said reflector adjacent said aperture, supporting said reflector in position, without blocking said aperture.

6. A heating device, comprising: a support,

having locating abutment means; heating means,

secured to saidsupport; means for directing heat produced by' said heating means, comprising a generally dishshaped body having an opening located interiorly of the margins of said body;

fastening means, engaging said directing means adjacent said opening, so constructed and arranged to hold said directing means against axial movement with respect to said support, yet permit lateral movement of said directing means with r e-,

spect' to said support; and the margins of said body abutting said support abutment means to position said directing means laterally with rethe cross-sectional area 0! said stud being subspect'to said support. stantially smaller than the cross-sectional area 7. A heating device, comprising: a support, of said opening, whereby said directing means is having locating abutment means; heating means, held against axial movement with respect to said 5 secured to said support; means for directing heat support, yet is-permitted to move laterally with 5 produced by said heating means, comprising a respect to said support; and the margins 01 said generally dish-shaped body havingacentralopenbody abutting said support abutment means to lug; fastening means, comprising a stud extendposition said directing means laterally with reing from said support through said central openspect to said support. 10 ing, and a part detachably secured to said stud 1 and engaging said body adjacent said aperture, ERNEST N. CALHOUN. 

